Daily Archives: September 2, 2008

Oracle, Oracle 10g

DBCA will not start with error NJNI10

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1. If you see the error below when trying to execute DBCA try the next three steps to resolve.

[oracle@mylinux1 bin]$ ./dbca

UnsaUntitled 1tisfiedLinkError exception loading native library: njni10
Exception in thread “main” java.lang.UnsatisfiedLinkError: get
at oracle.net.common.NetGetEnv.get(Native Method)
at oracle.net.config.Config.getNetDir(Unknown Source)
at oracle.net.config.Config.initConfig(Unknown Source)
at oracle.net.config.Config.(Unknown Source)
at oracle.sysman.assistants.util.NetworkUtils.(NetworkUtils.java:225)
at oracle.sysman.assistants.util.step.StepContext.(StepContext.java:264)
at oracle.sysman.assistants.dbca.backend.Host.(Host.java:686)
at oracle.sysman.assistants.dbca.ui.UIHost.(UIHost.java:205)
at oracle.sysman.assistants.dbca.ui.InteractiveHost.(InteractiveHost.java:54)
at oracle.sysman.assistants.dbca.Dbca.getHost(Dbca.java:160)
at oracle.sysman.assistants.dbca.Dbca.execute(Dbca.java:94)
at oracle.sysman.assistants.dbca.Dbca.main(Dbca.java:180)

[oracle@mylinux1 bin]$

2. Create the following soft links in $ORACLE_HOME/bin directory and retry ./dbca command.

[oracle@mylinux1 bin]$ ln -s $ORACLE_HOME/lib/libnjni10.dylib $ORACLE_HOME/lib/libnjni10
[oracle@mylinux1 bin]$ ln -s $ORACLE_HOME/lib/libclntsh.dylib $ORACLE_HOME/lib/libclntsh.dylib.10.1

3. If the previous step did not resolve the issue ensure that the variable LD_LIBRARY_PATH contains both $ORACLE_HOME/lib and $ORACLE_HOME/lib32. Re-execute your .bash file and retry ./dbca command.

[oracle@mylinux1 ~]$ vi .bash_profile
[oracle@mylinux1 ~]$ . ./.bash_profile

4. If the previous step did not resolve the issue, install or re-install the following 32 bit packages: glibc-devel-2.3.4-2.36.i386.rpm and glibc-2.3.4-2.36.i686.rpm. Then cd to $ORACLE_HOME/bin and execute ./relink all. Finally, retry the ./dbca command.

[root@mylinux1 RPMS]# rpm -Uvh –force glibc-devel-2.3.4-2.36.i386.rpm
Preparing… ########################################### [100%]
1:glibc-devel ########################################### [100%]
[root@mylinux1 RPMS]# rpm -Uvh –force glibc-2.3.4-2.36.i686.rpm
Preparing… ########################################### [100%]
1:glibc ########################################### [100%]
[root@mylinux1 RPMS]#
Larry J Catt, OCP
oracle@allcompute.com
www.allcompute.com

ASM, Oracle, Oracle 10g

ASM with RAW Disks will not start after reboot

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ASM (Automatic Storage Management) instances for the storage of database files have become a very popular option in the database world since the release of ORACLE 10g. However, there exist several administration concerns over ASM, which the DBA must take into consideration. This article covers the problem of ASM instance not starting after a reboot of a Linux server and applies to most Unix systems while using RAW Disks.

Error: ORA-15042: ASM disk is missing.

Reason: This error is caused by the RAW device being removed from the OS, corrupted, or/and most likely, not owned by the ORACLE user.

1. Verify that the ASM disk exists.

[root@mylinux1 /]# cd /dev/raw
[root@mylinux1 /dev/raw]# ls
/dev/raw/raw1
/dev/raw/raw2
/dev/raw/raw3
[root@mylinux1 u06]#

2. Check the ownership of the disks.

[root@mylinux1 /]# cd /dev/raw
[root@mylinux1 /dev/raw]# ls –la
-rw-r–r– 1 root root 2 Sep 2 08:33 raw1
-rw-r–r– 1 root root 2 Sep 2 08:33 raw2
-rw-r–r– 1 root root 2 Sep 2 08:34 raw3
[root@mylinux1 /dev/raw]#

NOTE: These raw devices are now owned by ROOT after the reboot, thus ORACLE does not have access.

3. On most UNIX systems you will see that the ownership of RAW devices is reset to ROOT after reboot. To correct this behavior, enter the following code into your init process before the Oracle database startup scripts are executed.

chown oracle:dba /dev/raw/raw1
chown oracle:dba /dev/raw/raw2
chown oracle:dba /dev/raw/raw3
Larry J Catt, OCP
oracle@allcompute.com
www.allcompute.com

ASM, Oracle, Oracle 10g

CRS setup for ORACLE 10g ASM instance

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In order for ASM and RAC to work properly the CRS (Cluster Ready Service) must first be configured. This procedure outlines the configuration of CRS in a Linux environment.

1. Logon to Linux server as the root user.

2. Verify that the correct support packages are installed.

[root@mylinux_1 RPMS]# ls compat-libstdc++*
compat-libstdc++-296-2.96-132.7.2.i386.rpm

3. NOTE: depending on your OS you may require a different version or bit setting of this package. I am running x86_64 system so I will install the newest compat-listdc++ package for this system.

[root@mylinux_1 RPMS]# rpm -i compat-libstdc++-33-3.2.3-47.3.x86_64.rpm
[root@mylinux_1 RPMS]#

4. As the ROOT user navigate to the directory $ORACLE_HOME/bin. Execute the command ./localconfig add. The localconfig command cannot be run as the ORACLE user.

[root@mylinux_1 bin]# ./localconfig add
Successfully accumulated necessary OCR keys.
Creating OCR keys for user ‘root’, privgrp ‘root’..
Operation successful.
Configuration for local CSS has been initialized

Adding to inittab
Startup will be queued to init within 30 seconds.
Checking the status of new Oracle init process…
Expecting the CRS daemons to be up within 600 seconds.
CSS is active on these nodes.
mylinux_1
CSS is active on all nodes.
Oracle CSS service is installed and running under init(1M)
[root@mylinux_1 bin]#

5. If CRS fails to install you must back out the files created with the command ./localconfig delete. Most likely the failure has occurred due to missing support packages. Verify that all packages suggested by Oracle Corporation for your OS and product version exist. You can find this listing at www.oracle.com/technology/index.html.

Larry Catt, OCP
oracle@allcompute.com
www.allcompute.com